Page:NIOSH Manual of Analytical Methods - 1018-3.pdf/1

 1,2-DICHLOROTETRAFLUOROETHANE See DICHLORODIFLUOROMETHANE (METHOD 1018) for procedure CClF2CCIF2

MW: 170.92

METHOD: 1018, Issue 2

CAS: 76-14-2

RTECS: KI1101000

EVALUATION: FULL

OSHA : 1000 ppm NIOSH: 1000 ppm ACGIH: 1000 ppm (1 ppm = 6.99 mg/m 3 @ NTP)

PROPERTIES:

Issue 1: 15 August 1987 Issue 2: 15 August 1994

gas; BP 3.8 °C; MP -94 °C

SYNONYMS: cryofluorane, Refrigerant 114

SAMPLING SAMPLER:

SOLID SORBENT TUBES (two coconut shell charcoal tubes in series, 400/200 mg and 100/50 mg)

MEASUREMENT TECHNIQUE:

GAS CHROMATOGRAPHY, FID

ANALYTE:

1,2-dichlorotetrafluoroethane

FLOW RATE: 0.01 to 0.05 L/min

DESORPTION:

20 mL methylene chloride

VOL-MIN: -MAX:

1 L @ 1000 ppm 4L

INJECTION VOLUME:

1 µL

SHIPMENT:

refrigerated

SAMPLE STABILITY:

TEMPERATURE-INJECTOR: -DETECTOR: -COLUMN:

at least 7 days @ -10 °C

BLANKS:

2 to 10 field blanks per set

200 °C 260 °C 35 °C for 3 min, 15 °C/min to 75 °C, hold 6 min

CARRIER GAS:

He, 1.5 mL/min

COLUMN:

DB-1 fused silica capillary, 30 m x 0.32-mm ID, 1-µm film thickness or equivalent

CALIBRATION:

standard solutions of analyte in methylene chloride

RANGE:

5 to 40 mg per sample [1]

ACCURACY RANGE STUDIED:

1800 to 6970 mg/m 3 [3]

BIAS:

0%

ˆ ): 0.074 [3] OVERALL PRECISION (S rT

ESTIMATED LOD: 0.03 mg per sample [1]

ACCURACY:

PRECISION (Sr):

± 14.5%

0.038 @ 10-40 mg per sample [1]

APPLICABILITY: The working range is 700 to 5700 ppm 1,2-dichlorotetrafluoroethane (5000 to 40,000 mg/m 3) for a 1-L air sample. This method was first evaluated for dichlorodifluoromethane and 1,2-dichlorotetrafluoroethane with packed column gas chromatography [1].

INTERFERENCES: None identified.

OTHER METHODS: This combines and revises Methods S111 and S108 [2].

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94